Municipal Administration Herisau

The waste water treatment plant in Herisau cleans the waste water of 94% of the population of Herisau. After a number of investments, the treatment plant can now also remove tiny contaminants (so-called micro-pollutants).

First Storage and Dosing Plant for Powdered Active Carbon in Switzerland
Date of execution: 2013 to 2015


New construction of an powdered activated carbon storage and dosing plant with gravimetric dosing, suspension tank and dosing pumps for the elimination of trace substances from the waste water (4th purification stage).

Here you find the official Website of the municipality Herisau.

Here you get the official brochure of ARA Bachwis.

Here you get the description of the plant.